Well, I think the first thing you can try is to give something different than in this article, just to review what best practices: https://documentation.meraki.com/MR/Wi-Fi_Basics_and_Best_Practices/Channel_Planning_Best_Practices https://documentation.meraki.com/MR/Wi-Fi_Basics_and_Best_Practices/Multi-SSID_Deployment_Considerations You can also try creating a new SSID on 5Ghz only, to validate if the behavior is the same. Review your Rf profile configuration, and SSID configuration. On Windows machine you can try modify agressive roaming configuration.
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